Customize statis initialize move dir in simtest (MystenLabs#18752)

## Description 

So that other projects can choose their own move package for this static
initialization.

## Test plan 

How did you test the new or updated feature?

---

## Release notes

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your changes, release notes aren't required.

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that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

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crates/sui-proc-macros/src/lib.rs

@@ -57,8 +57,7 @@ pub fn init_static_initializers(_args: TokenStream, item: TokenStream) -> TokenS
                     use sui_simulator::move_package::package_hooks::register_package_hooks;
 
                     register_package_hooks(Box::new(SuiPackageHooks {}));
-                    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-                    path.extend(["..", "..", "examples", "move", "basics"]);
+                    let mut path = PathBuf::from(env!("SIMTEST_STATIC_INIT_MOVE"));
                     let mut build_config = BuildConfig::default();
 
                     build_config.config.install_dir = Some(TempDir::new().unwrap().into_path());

scripts/simtest/cargo-simtest

@@ -96,6 +96,11 @@ fi
 # Must supply a new temp dir - the test is deterministic and can't choose one randomly itself.
 export TMPDIR=$(mktemp -d)
 
+# Set the example move package for the simtest static initializer
+# https://github.com/MystenLabs/sui/blob/7bc276d534c6c758ac2cfefe96431c2b1318ca01/crates/sui-proc-macros/src/lib.rs#L52
+root_dir=$(git rev-parse --show-toplevel)
+export SIMTEST_STATIC_INIT_MOVE=$root_dir"/examples/move/basics"
+
 cargo ${CARGO_COMMAND[@]} \
   --config "build.rustflags = [$RUST_FLAGS]" \
   "${cargo_patch_args[@]}" \